Some recent posts questioned the accuracy of the OM-1 with either an MR9
or other meter mod. I've compared the meter accuracy of the last 6
OM-1/1Ns that I've converted to the silver oxide 357 battery (using the
1N34A diode.) Here is what I found:
Meter setting is first made at BV12, then the other levels are checked.
BV15 = 1/1000 @ f5.6 (asa 100) error = 0 stops
BV12 = 1/125 @ f5.6 (asa 100) error = 0 stops
BV9 = 1/15 @ f5.6 (asa 100) error = 0 stops
BV6 = 1/2 sec @ f5.6 (asa 100)error = +1/4 stop.
All 6 cameras were identical, once the meter was set up at BV12.
John
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